As the show is set in England, it's fitting that the Englishman Marcus Mumford sings the theme. It's also a boon because Mumford is well known in America, where most of the show's viewers reside.
Musically, Mumford tried to split the difference between the US and UK. "We listened to a lot of Beatles and Gerry and the Pacemakers, and then also Creedence Clearwater Revival, as references," he told The Hollywood Reporter
. "It should feel somewhere halfway between London and Kansas, where Ted's from."
Mumford also drew inspiration from the BBC highlights show Match Of The Day